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How much power do i need?

i am going to crossfire 2 5750s. How much power do i need?
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More about power need
  1. Copy paste from AMD's website.

    450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)


    So 600W
  2. A quality 500w unit. Corsair cx500w is a great cheap unit.
  3. This one will also do it, and allow for a little upgrade room should you decide on higher end cards. Mine has been stellar so far(3 months), and it just happens to be a great deal right now with the rebate which I had no trouble getting. http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017
  4. i have like a 100 watt cpu that i am going to be getting though. thanks though,
  5. A 500w unit.
  6. AxemanACL said:
    Copy paste from AMD's website.

    450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)


    So 600W



    ^ This is straight from the AMD site.


    I would NOT use a 500w PSU with 600w being recommended. That would be a generic 600 watt unit but I would not risk a 500w unit as was recommended above. Also that OCZ linked to is a decent power supply but you can do better for the same money.

    http://www.eggxpert.com/forums/thread/323050.aspx

    Try this.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151096
  7. A good 500 watt PSU will do nicely. A pair of 5750's will pull about 150 watts (12 - 13 amps) at load.

    One of my systems has an OC'd Q9550, 4 GB RAM, a GTX260 - a card with similar power requirements to two 5750's, a Gigabyte EP45-UD3P motherboard, 3 hard drives (2.6 TB total)and an optical, and a Soundblaster card all powered by a Corsair 750TX.

    Running 3 instances of Prime95 to load the CPU and 3DMark06 to load the GPU, it pulls 375 watts from the wall as measured by my Kill-a-Watt meter. Figuring 80% PSU efficiency, the system pulls 300 watts from the PSU.
  8. Best answer
    Scroll down the page to the power consumption section. These guys are using a 130W cpu and they have it overclocked so it is drawing more than that. With crossfire 5750's they measured a peak of 425W. Though they do recommend a 600W power supply(the same as AMD). Things will probably work just fine with a quality 500W so if you have one already then stick with it. If not, then just get what AMD recommends.

    http://www.guru3d.com/article/radeon-hd-5750-review-crossfirex/10
  9. so then 600w should work fine 400-500w for the gpus, and 100w for the cpu.

    ill probably try to get a around a 675w psu so i have extra room in case i want to overclock.
  10. A little headroom is always nice and I would get ,at the minimum, what the manufacturer recommends.
  11. Best answer selected by baller43.
  12. This topic has been closed by Mousemonkey
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